S
M
T
W
T
F
S
26
87°
76°
27
87°
76°
28
88°
75°
29
87°
76°
30
88°
76°
31
88°
75°
1
87°
76°
2
88°
75°
3
87°
75°
4
88°
75°
5
89°
74°
6
91°
76°
7
92°
73°
8
91°
76°
9
92°
73°
10
88°
75°
11
92°
75°
12
90°
74°
13
88°
74°
14
88°
75°
15
92°
76°
16
92°
75°
17
91°
75°
18
91°
76°
19
90°
75°
20
91°
76°
21
88°
75°
22
91°
75°
23
92°
73°
24
91°
72°
25
88°
73°
26
89°
72°
27
88°
73°
28
89°
72°
29
88°
73°
30
87°
75°
31
90°
74°
1
91°
72°
2
90°
74°
3
90°
73°
4
89°
73°
5
87°
74°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Slidell
Slidell's August 2026 forecast shows daily high temperatures ranging from 87° to 92°, with overnight lows between 72° and 76°. The average high for August is 89° with an average low of 74°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Slidell. See also: September | October | November.
